20239497 has 16 divisors (see below), whose sum is σ = 30952960. Its totient is φ = 13057200.

The previous prime is 20239493. The next prime is 20239501. The reversal of 20239497 is 79493202.

It is an interprime number because it is at equal distance from previous prime (20239493) and next prime (20239501).

It is not a de Polignac number, because 20239497 - 2² = 20239493 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20239493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11254 + ... + 12927.

It is an arithmetic number, because the mean of its divisors is an integer number (1934560).

Almost surely, 2^20239497 is an apocalyptic number.

20239497 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20239497 is a deficient number, since it is larger than the sum of its proper divisors (10713463).

20239497 is a wasteful number, since it uses less digits than its factorization.

20239497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24221 (or 24215 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 20239497 is about 4498.8328486397. The cubic root of 20239497 is about 272.5209567812.

It can be divided in two parts, 20239 and 497, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20239497 in words is "twenty million, two hundred thirty-nine thousand, four hundred ninety-seven".